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Hajjine, B., Escriba, C., Campo, E., Zedek, S., Acco, P., Soto Romero, G., Hemeryck, A. and Fourniols, J.Y. (2015) Development of an Electronic Patch for Falls Detection and Elderly Tracking. Proceedings of the International Conference on Biomedical and Health Informatics (ICBHI), Haikou, 9-10 October 2015. (in press)

has been cited by the following article:

• TITLE: Development of a Printed Coil for Wirelessly Charging a Tracking Elderly Patch

  AUTHORS: Bouchta Hajjine, Christophe Escriba, Samuel Charlot, Anne Hemeryck, Julien Roux, Sabeha Fettouma Zedek, Jean-Yves Fourniols

  KEYWORDS: Wireless Charger, Receiving Coil, Tracking Patch, Cleanroom Process

  JOURNAL NAME: Wireless Engineering and Technology, Vol.7 No.2, April 19, 2016

  ABSTRACT: Monitoring systems for elderly require a compromise between reduced size and operational autonomy. The latter to get a system as independent as possible and to fit with our application needs for daily use. Our patch is developed as a surveillance system for old people; we chose to equip it with a wireless charging system for greater ease of use, imperceptible in the everyday life and waterproofing. This paper presents the development of a printed receiver coil to be integrated in a wireless charger to be used in an elderly tracking patch. The proposed design is validated using simulation that presents a good agreement with measurement results: Simulation (@150 KHz: L = 10.74 μH; R = 3 Ω) and Measurement (@150 KHz: L = 10.8 μH; R = 3.16 Ω). The receiver coil is elaborated on a polyimide substrate in the cleanroom of our laboratory LAAS-CNRS (Laboratory for Analysis and Architecture of Systems-National Center for Scientific Research) and a PCB (Printed Circuit Board) charger prototype is fabricated to test its performances before the integration of the wireless charging property in the tracking patch. The proposed coil presents a good compromise between small size and efficiency. For a charging current of 7.5 mA, this coil can ensure the recharging of the patch up to a distance of 4.8 mm between the Qi transmitter and receiver which is more than enough for our application.